different in kind; unlike; incongruous.

composed of parts of different kinds; having widely dissimilar elements or constituents

The party was attended by a heterogeneous group of artists, politicians, and social climbers.

Chemistry . (of a mixture) composed of different substances or the same substance in different phases, as solid ice and liquid water.

noun

diverseness , diversification , diversity , heterogeneity , miscellaneousness , multifariousness , multiformity , multiplicity , variegation , variousness